Hi there,
Any idea
1. how to run an instrumental variable Heckman in
STATA?
2. why the estimations (coefficients and standard
error) obtained from a manually conducted IV Tobit
differ from that obtained by running the STATA
built-in IVTobit model. By manual I meant: run OLS in
stage 1 and plug in the residuals from stage 1 in the
simple tobit model in stage 2)
I would appreciate, please.
wawuye.
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